GitLab

We no longer use GYP, and it is confusing to keep having
APIs or comments for it.

Bug: None
Change-Id: I0d2cd0f4c5b41edeab3ea65785a5eec9a4324b44
Reviewed-on: https://chromium-review.googlesource.com/c/1322344Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Hitoshi Yoshida <peria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605998}